52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
// Copyright 2019 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef MEDIAPIPE_DEPS_ALIGNED_MALLOC_AND_FREE_H_
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#define MEDIAPIPE_DEPS_ALIGNED_MALLOC_AND_FREE_H_
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#include <stdlib.h> // for free(), aligned_alloc(),
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#if defined(__ANDROID__) || defined(_WIN32)
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#include <malloc.h> // for memalign() on Android, _aligned_alloc() on Windows
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#endif
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inline void *aligned_malloc(size_t size, int minimum_alignment) {
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#if defined(__ANDROID__) || defined(OS_ANDROID)
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return memalign(minimum_alignment, size);
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#elif _WIN32
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return _aligned_malloc(size, minimum_alignment);
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#else // !__ANDROID__ && !OS_ANDROID && !_WIN32
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void *ptr = nullptr;
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// posix_memalign requires that the requested alignment be at least
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// sizeof(void*). In this case, fall back on malloc which should return memory
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// aligned to at least the size of a pointer.
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const int required_alignment = sizeof(void *);
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if (minimum_alignment < required_alignment) return malloc(size);
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if (posix_memalign(&ptr, static_cast<size_t>(minimum_alignment), size) != 0)
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return nullptr;
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else
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return ptr;
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#endif
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}
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inline void aligned_free(void *aligned_memory) {
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#ifdef _WIN32
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_aligned_free(aligned_memory);
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#else
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free(aligned_memory);
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#endif // _WIN32
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}
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#endif // MEDIAPIPE_DEPS_ALIGNED_MALLOC_AND_FREE_H_
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